# dev.workers.perch-app.kestrel/kestrel (remote · kestrel.perch-app.workers.dev)

Watch any URL for changes: baseline, then check for a diff. Free, no signup/key.

- Trust score: 58/100 (low)
- Change this week: +4
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-10-01

## Components

- remote · `kestrel.perch-app.workers.dev`: 58/100 (this document), [markdown](https://verifymcp.io/servers/dev-workers-perch-app-kestrel-kestrel/kestrel.md), [page](https://verifymcp.io/servers/dev-workers-perch-app-kestrel-kestrel/kestrel)

## Channel facts

- Endpoint: `https://kestrel.perch-app.workers.dev/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.0.0`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-10-01.

- **Endpoint Security**: 46/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - Authorisation not fully verified: no authorisation is required to call this server, and 4 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe.
  - HTTPS check failed: the endpoint is reachable over plaintext HTTP.
  - HSTS check failed: the Strict-Transport-Security header is absent.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 73/100
  - AI-judged instruction clarity (good).
  - Tool/resource definitions use about 273 tokens (~68/item across 4 items; 4 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 30/100
  - Stability observed for 9 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 83/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 50% of tool parameters carry a description.
- **Tool Safety**: 75/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - 0 of 1 tool(s) whose name or description implies an irreversible operation declare an MCP destructiveHint annotation; "delete_watch" implies "delete" and declares no destructiveHint at all, which the MCP spec reads as destructive by default.
  - An AI judge read all 4 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 20/100
  - Spec-recency check failed: implements MCP spec 2024-11-05; the latest is 2026-07-28.

## Install

### How do I install the dev.workers.perch-app.kestrel/kestrel MCP server?

dev.workers.perch-app.kestrel/kestrel is a hosted endpoint at https://kestrel.perch-app.workers.dev/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add --transport http dev-workers-perch-app-kestrel-kestrel 'https://kestrel.perch-app.workers.dev/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "dev-workers-perch-app-kestrel-kestrel": {
      "url": "https://kestrel.perch-app.workers.dev/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "dev-workers-perch-app-kestrel-kestrel": {
      "type": "http",
      "url": "https://kestrel.perch-app.workers.dev/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.dev-workers-perch-app-kestrel-kestrel]
url = "https://kestrel.perch-app.workers.dev/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "dev-workers-perch-app-kestrel-kestrel": {
      "type": "remote",
      "url": "https://kestrel.perch-app.workers.dev/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add dev-workers-perch-app-kestrel-kestrel --url 'https://kestrel.perch-app.workers.dev/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  dev-workers-perch-app-kestrel-kestrel:
    url: "https://kestrel.perch-app.workers.dev/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "dev-workers-perch-app-kestrel-kestrel": {
      "Transport": "http",
      "Url": "https://kestrel.perch-app.workers.dev/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add dev-workers-perch-app-kestrel-kestrel -t streamable-http -u 'https://kestrel.perch-app.workers.dev/mcp'
```

### Other

```json
{
  "mcpServers": {
    "dev-workers-perch-app-kestrel-kestrel": {
      "type": "http",
      "url": "https://kestrel.perch-app.workers.dev/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-10-01 (score 58, +1)

No change was recorded against any check on this day. Stability & Change Management went from 27 to 30. That category is still filling its 30-day observation window: 8 days of observed history at the previous scan, 9 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-29 (score 57, +1)

No change was recorded against any check on this day. Stability & Change Management went from 20 to 23. That category is still filling its 30-day observation window: 6 days of observed history at the previous scan, 7 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-28 (score 56, 0)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-09-27 (score 56, +1)

No change was recorded against any check on this day. Stability & Change Management went from 13 to 17. That category is still filling its 30-day observation window: 4 days of observed history at the previous scan, 5 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-25 (score 55, +1)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-09-23 (score 54, +1)

- [functional improvement] Stability: unverified → 0.03

### 2026-09-22 (score 53)

First indexed and scored.

## MCP tools (4)

### `create_watch` (~130 tokens)

Start monitoring a web page (or JSON/text URL) for changes. Captures a baseline snapshot now. Returns a watch_id and a token — save the token; it's how you check and manage your watches later. Pass an existing token to add more watches under the same account.

Input parameters:

- `label` (string): Optional human label for this watch.
- `token` (string): Optional. Your existing Kestrel token to group this watch with others. Omit to get a new token.
- `url` (string, required): Absolute http(s) URL to monitor, e.g. https://example.com/pricing

### `check_watch` (~81 tokens)

Re-fetch a watched page and report whether it changed since the last check, with a short list of added/removed content lines. Updates the baseline to the new content. Call this every time you want the latest status (e.g. each run/heartbeat).

Input parameters:

- `token` (string, required): The token returned by create_watch.
- `watch_id` (string, required)

### `list_watches` (~30 tokens)

List all watches under your token, with per-watch check/change counts.

Input parameters:

- `token` (string, required)

### `delete_watch` (~32 tokens)

Stop monitoring a page and delete the watch.

Input parameters:

- `token` (string, required)
- `watch_id` (string, required)

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/dev-workers-perch-app-kestrel-kestrel/kestrel#diagnostics

## Score history

- 2026-10-01: 58
- 2026-09-30: 57
- 2026-09-29: 57
- 2026-09-28: 56
- 2026-09-27: 56
- 2026-09-26: 55
- 2026-09-25: 55
- 2026-09-24: 54
- 2026-09-23: 54
- 2026-09-22: 53

## Common questions

### What is the dev.workers.perch-app.kestrel/kestrel MCP server?

dev.workers.perch-app.kestrel/kestrel is an MCP server listed in the public MCP registry as dev.workers.perch-app.kestrel/kestrel. Watch any URL for changes: baseline, then check for a diff. Free, no signup/key. This page covers its hosted endpoint (https://kestrel.perch-app.workers.dev/mcp).

### Is the dev.workers.perch-app.kestrel/kestrel MCP server safe to use?

dev.workers.perch-app.kestrel/kestrel scores 58 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the dev.workers.perch-app.kestrel/kestrel MCP server expose?

dev.workers.perch-app.kestrel/kestrel exposes 4 tools: create_watch, check_watch, list_watches, delete_watch. Their descriptions and schemas cost roughly 273 tokens of context every time the server is loaded.

### Does the dev.workers.perch-app.kestrel/kestrel MCP server require authentication?

No. We connected to dev.workers.perch-app.kestrel/kestrel without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the dev.workers.perch-app.kestrel/kestrel MCP server still maintained?

dev.workers.perch-app.kestrel/kestrel is still listed as active in the MCP registry. We last reached this channel on 1 October 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

## Links

- Remote endpoint: https://kestrel.perch-app.workers.dev/mcp
- Website: https://kestrel.perch-app.workers.dev/
- Changelog RSS feed: https://verifymcp.io/servers/dev-workers-perch-app-kestrel-kestrel/kestrel.xml
- Changelog JSON feed: https://verifymcp.io/servers/dev-workers-perch-app-kestrel-kestrel/kestrel.json
- HTML version of this page: https://verifymcp.io/servers/dev-workers-perch-app-kestrel-kestrel/kestrel